Dental plugger



M d 1. 1?. c. RIES.

DENTAL PLUGGER.

' Patented Apr. 8-, 1890.

PATENT, FFICE FREDERICK C. RIES, OF MACON, GEORGIA.

DENTAL PLUGGER.

SPECIFI'AIIQN forming part of Letters Patent No. 425,344, dated April 8, 1890. Application filed d'une 5, 1889. Serial No. 313,232. (Model.)

T0 aZZ w7wm it may concern:

Be it known that I, FREDERICK C. RIES, of Macon, in the connty of Bibb and State of Geo1gia, have in vented certain new and nsefnl Improvements in Dental Plnggers; and I do hereby declare thefollowing to be a f n11, clear, and exact description of the invention, snob as Will enable others skiiled in the art to which it pertains t0 malte and use it, reference being had to the aceompanying drawings,whieh form part of this specification.

My invention relates to an improvement in dental plnggers; and the objeets of my inventon are to provide a very small light tool which is adapted to be'operated by a 1notor of any suitable kind, and in which the parts are so constrncted that the plngger is not bronght into operation nntil the operator desires; to use both a light and a heavy spring npon the same rod, so as to regnlate the force of the blows which are to be given; to increase or decrease the pmver of the blows at the Will of the operator by a mere movement of a thnmbslide, and to 'provide an extension tool-holder by means of which the ordinary tools are adapted to work npon teeth in the back of the head or month.

Figure 1 is a side elevation of a dental plngger, Which cmbodies my invention coinplete. the operatii1g parts, the side of the casing being removed. Fig. 3 is adetaohed view of the toolholder and operating-lever. Figs'. 4:, 5, 6, 7, S, and 9 are detail views of the diierent parts. Fig. 10 is a side elevation of the plng ger with the expansion-oover. Y

C represents the end of the operatingshait, throngh which connection is made with the foot-power, the eleetric engine, or any other motor. This shaft 0 is jonrnaled in snitable bearings prepared for it in the end of the oasing E, and the pinion D may eitlier be made as a part of the shaft or secnred thereto, as may be preferred. This pinion D on the shaft C engages Witli the wheel F, which has an opening with a square shonlder made thrcingh it-s center, and in this opening is placed a plate G, having square edges or fianges to correspond to the shape of the opening throngh the wheel F. This plate is prevented from revolving by means of the Fig. 2 is an enlarged side elevation of pins H, whieh pass into or ihrongh the plate I, npon which the plate Gr is placed. Throngh the opening in the center of this plate is passed a screw, which serves t0 seonre tire plate G rigidlyin position, and throngh the plate to hold the wheel F in contact With the- The wheel F revolves freely aronnd the plate G, as shown, for the pnrposc of cansing the pin J whieh projeets from its face, to operate thc spring-pitman K, which is provided with the arrow-shaped head L. The pitman K is made elastic, so that as the wheel F revolves rapidly aronnd, its pin J will simply force the pitman to one side, so as to allow the pin to pass by withont operating the pitman when the operator does not desire the pitman to be bronght into play. Vhen the pitman is to be broght intoplay, and it is moved endwise so as to bring its head L into position, the pin J catches behind the shonlders of the head and moves the pitman endwise as the wheel F is revolved nntil the end of the head L strikes against the. toolhead N, placed inside of the frame j nst beyond the edge of the wheel F. VVhen the mallet strikes against the tool-head or lever, all further movement of the pitn1 an is stopped, and then the pin- J moves on aronnd, and when it slips frorn under the end of the head L the pitman is retracted by the two springs P Q, placed npon the rod 0. The head N npon plate I.

the rod O serves simply to hold the pitman K, and nothing more. To opposite ends of the rod 0 are secured the endwise-movinghead N and the mallet.

Plaoed inside of the casing E is the stationary partition S, throngh whioh the rod 0 passes, and seonred to this partition is a cnrved spring T, as shown in Fig. 6, and which has its onter end to extend straight ontward beyond the edge of the partition and throngh a 51013 inthe oasing E, so as to hold the cover U of the casing in position. This cover U has a notch'made in its end, and in this noteh the projecting point of the spring T catches. Vhen the projecting point of the spring is forced ont of the notch by the finger-nail, the cover can be slipped off and the wheel F and other parts Wll be exposed for lnbrioation, display, or repairs. This dental plngger can also be fastencd to the dental engine in the ICO same manner as the cover L, is fastened to the dental plugger, using the same spring, notch, and pin. A

Placed inside et the casing E, upon the rod 0, is the sliding sleevc or collar V, which has .a screw-socket formed in one ,side, and into which socket a screw-threaded portion of the nut WV, also loosely placed upon the rod O, screws. This sleeve V and screw W are con- 11 ected together, and slide bac]: and forth upon the rod for the purpos of regulating the tension of the springs P Q, and thns regulate the blow which 'shall be given to the tool while in use npon the filling et the tooth. The nut XV,having a roughened surface, has a portion of its surface exposed through a slot X in the casing E, so that the finger of the operator can reach it at any time and thus adjust the tension of the springs P Q at Will. The sliding collar V is attached by means of a small wire or rod Y, Which passes through a groove Z in the.mallet R to the thumb or finger-slide A, so that by the movement of the slide A bythe thumb of the operator he can move the collar V and nut W endwise upon the rod 0, and thus increase the tension of the springs P Q at Will. The

rod or wire is very small and passes inside of the casing E through the groove Z in the mallet to the collar V, as shown.

Inside of the thumb-slide A is made a button B, which passes throngh slot 0 in the casing E, and which button serves to hold the thumb-slide in position npon the side.of the casing E. When the regulating devices are not brought into use, the tension et the strong spring P is not intertered With, but as soon as the thumb-slide, ball, or scrcw are moved the strong spring P and the weak one Q are compressed between the nut WV and the end of the mallet R; hence'a strongerblow is necessarily given. The twosprings P Q are separated by a loose washer Q. Two springs of different tensions are used, .so that the weaker one will act on the mallet independently of the other, whereby the softest or lightest blows can be obtained. The construction here shown does not admit of lengthening or shortening the stroke of the mallet, and hence :the importance of the weaker spring Q.

In the end of the mallet is formed a recess or cavity P, into which the weaker spring Q can be forced by the washer Q, in which case the tension of both springs is brought into play for the purpose of producing stronger blows. Vhen the washer Q rests against the end of the mallet, the spring P is compressed between the end of the mallet R and the nut W. The weak spring Q is always in play, but the stronger spring P is not in play while the minimum soft blows are being used, because the 'blows are too light to affect the heavy spring, while they do affect the light spring. If auniform blow is desired, the casing E may be providcd With a serics of perforations into which the springpin or catch upon the thnmbslide will catch, and thus hold the 'thumbprojections D, which serve to keep it out of actual contact with the casing E, and thus decrease the amount of friction between the paris.

Inside of the casing E, just beyond the end of the mallet., is placed the tool-holder E, of the construction shown in Fig. 3, and placed in a groove in the inner end of this toolholder is the L-shaped lever F, provided with a handle G, which projects through a slot or opening in the casing E. A portion of the head orinner end of the tool-holder E is out away, as shown, so as to form the shoulder H, and the L-shaped portion ofthe lever F projeets clown below this shoulder, as seen in Fig. 3. The end of the mallet R, When the instrument is not in use, does not touch the end of the lever F; but when the operator upon its fulcrum and the inner end of the lever is moved outward, so as to come in contact With the end of the mallet, and thus the mallet is instantly brought into operation. The mallet can also be brought into operation by giving the cool-head an ihward movement, so that when pressure is brought to bear npon the mol-point the pitman-shoulder Will be moved into contact With the mallet.

In order to enable the same tools to be used in all parts et the mouth, a second toolholder I can be placed inside of the one E, and which tool-holder I serves as an extension, so as 'to make the ordinary tools long enoughto operate upon the teeth in the back of the mouth, and thus do away With speci al long instruments for this purpose. Over the end of the tool-holder isplaced a eonical plug J, as shown in Fig. 1, and which projects beyond the end of the case any suitable distance.

The cover L (shown in Fig. 10) is provided With a notch N in its inner end, and which notch catches over a projecting point of the spring T upon the partition S. A small lug A, which projects from the casing E, also catches in the notch N, and prevents the cover from turning. of the spring hold the cover to the instrument, as shown in Fig. 10, the lug catches in the corner of the notch or recess N, and the spring snaps into the recess as the cover is pushed on, and ths the cover is rigidly fastened to the casing E. VVhen the cover is to he removed, the spring is pressed out of the recess by the finger-nail, and then the cover can be drawn off. The mallet is prevented The lug A and the projecting point from turning in the casing E, so that the 3101)- Z is always in position to reeeive the wire Y. The tooLholder and the other portions are also prevented from revolving.

Having thns described n1y invention, I claim 1. The eombination of the casing E, the rod 0, the head N, the pitman secnred to the head and an operating mechanism With the springs P Q, washer Q, and the mallet provided With a recess to receive the spring Q, snbstantially as set forth.

2. In a dental plugger, the eombination of the casing E, the mallet placed therein, the rod seeured to the mallet at one end, the head secured to the other end of the rod, the two springs P Q, 01? uneqnal tension, placed npon the rod, a washer Q, loosely placed on said rod t0 separate 111e springs, the sleeve V, and a regulatingnnt W, substantially as speci fied.

3, The combination of the mallet having a recess formed in its end, the rodQ, a slidingcollar placed on the rod, the springs PQ, and the washer Q, whereby the spring Q can be foreed into the recess, substantially as shown.

4. The combnatio of the mallec, the rod connected thereto, and the springs placed npon the-rod with the toolholder having an opening and a recess in its npper end and a lever provided with an operating-arm Which projeots through the cnsing, and an anglearm fulcrmed in ihe npper slotted end of the said hold ex, substantially as shown.

5. The combination of the easing E with the mallet R, provided With the groove Z, and the projections D, substantially as set forth.

6. The combination of the partition, the spring T, and lug A secured thereto, and the eover U, provided with a noteh in which the end of the spring catches, substantially as set forth;

7. The combination of the wheel F, having an opening through ts center, the Plate G,

pladed in the opening and provided With the 9. The combination of the revolving Wheel F, with a smd or projection J, and a snitable mechanism for operating it, with a spriflg pitman K, provided With a shonlder up0n each side of its free end, whereby the wheel may be made to operate the plngger when revolved in either direction, snbstantially as set forth.

In testimony whereof I affix my signature in presenee of two witnesses.

FREDERICK C. RIES. YVitnesses:

J. H. WILLIAMS, GEO. BEELOND. 

